Here is the full list of all 74 Kingdom Rush achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Complete the campaign in Veteran mode.
Fire the Sunray 20 times.
Complete all iron stages.
Complete all heroic stages.
Complete the campaign.
Defeat Myconid, the Rotten Fungus.
Kill 25 Shrooms without them poisoning your soldiers.
Capture the attention of the mysterious crow.
Defeat Lord Blackburn to avoid war between kingdoms.
Defeat Greenmuck and its minions.
Discover the hidden monster under water.
Kill 15 Wererats before they sicken any soldier.
Defeat Ulguk-Hai the Troll Warlord.
Find the 5 legendary lost ice-shrooms.
Defeat 10 Troll Pathfinders while they're treading on ice.
Find the elusive acorn.
Defeat Sarelgaz and its minions.
Have your Elves deal 10000 points of damage.
Find the ninja master rat.
Help Fredo escape.
Do not let The Kingpin escape.
Defeat Moloch the Demon Overlord.
Defeat 9 legions before they replicate.
Defeat Gul'Thak and its minions.
Teleport 250 or more enemies.
Have a single barbarian kill 10 enemies.
Have your Paladins perform 100 Holy Strikes.
Have your Paladins heal a total of 7.000 life.
Throw 500 or more axes.
Snipe 50 enemies.
Defeat Vez'nan.
Disintegrate 50 or more enemies.
Have your soldiers survive the explosion of 300 demons.
Build 4 Tesla towers in any stage.
Change soldiers' rally point 200 times.
Polymorph 50 enemies into sheep.
Summon 5 rock elementals in any one stage.
Drop 1.000 or more bomblets with the cluster bomb.
Shoot 100 missiles.
Kill 50 enemies by poison damage.
Earn 45 stars.
Earn 30 stars.
Have your soldiers regenerate a total of 50.000 life.
Train 1.00 soldiers.
Kill 300 enemies with electricity.
Build all 8 towers specializations.
Defeat J.T.
Train a hero up to max level.
Free the sasquatch on the Icewind Pass.
Kill 10.000 enemies.
Hold 500 or more enemies with Wrath of the Forest.
Send 1.000 soldiers to their deaths.
Sell 30 towers.
Build 150 towers.
Have at least 3 Imperial Guards survive in the Citadel.
Defeat The Juggernaut
Upgrade all basic tower types to level3.
Build 100 towers.
Kill 100 enemies with meteor showers.
Earn 15 stars.
Recruit max elves at The Silveroak Outpost.
Train a hero up to level 5.
Build 30 towers.
Sell 5 towers in a single mission.
Kill 2.500 enemies
Open 5 information cards.
Use Rain of Fire 5 times in a single stage.
Kill 10 or more sheep with your hands.
Catch a fish.
Kill 500 enemies.
Call 10 waves early.
Call all waves early in a single mission.
Kill one enemy.
Call a wave within 3 seconds of the icon showing up.